Custom turbo manifold question?

I'm not sure if this is the correct section, i would have thought this should go in Fabrication.

However that section appears to be mostly people showing off their work.

So, eventually i want to turbo my 2005 4.0 V6 Mustang, Not trying to get insane power, my goal is 300hp which 8-9 psi should get me to fairly easily. If i can reliably get more than that it will just be a bonus.

My problem is, the 4.0 while a fairly solid platform, Has virtually no aftermarket, so the manifold and downpipe I'm going to have to custom make, I made the mistake of calling a local speed/performance shop, Which tried to quote me $2000-$2500 just to fabricate a turbo manifold, Which unfortunately is just out of the question.

So i figured, we're talking about a header/manifold and a turbo flange after all. So i started thinking about how one could be made both efficiently and cheaply.

This is what I've come up with so far, i may be completely missing something but here goes...

I'd probably just fabricate some sort of turbo mount up-pipe off the factory exhaust manifolds. Don't forget an expansion joint where it crosses over. I'd trust those to stand up to heat better than no-name Chinese tube headers. You might be able to flip them side to side to get a bit more room to put the turbo somewhere up front.

But i'm wondering is it a bad practice to drive the turbo off a single bank, Did some searching some say it will work, and some say it will create asymmetrical back pressure.

SAAB did this. It can work, but there are a couple things to consider:

1. You will need a turbo where the compressor and turbine are sized for this, since you will have a much smaller exhaust gas volume available than normal.

2. This will result in very different cylinder filling characteristics from one bank to the other. You will need an ECU with individual cylinder trim adjustment on both the fuel and the spark to tune this properly.

This seems like more headache than it's worth to me. There isn't a real advantage of this over splitting your exhaust downstream of the turbo.

I've read a bit and some say these "better" or at least more expensive chinese turbos "can" work if they are properly setup, one thing everyone says is "oil, oil, and yeah more oil" But i've also seen conflicting information too, some say if your oil pump puts out 60psi or more you still need to run a restrictor even on a journal bearing.

But i'm trying to come up with the best way to accomplish a single turbo system (i think twin turbo would be pushing the stock engine past its limits) on a car with nothing available on the aftermarket for it, And i'm trying to keep the cost at the absolute minimum i can while still doing it somewhat "right" to the point that its not going to break after a few thousand miles.

I really want to try to do this for $1000 or less, I'm sure that is going to be a challenge I can buy a direct bolt on supercharger kit for about $1900, So my $1000 budget is based on having to do all of the work myself.

If i was a decent welder this would be simple, But I'm terrible So any welding i'm going to have to pay someone to do.

And i guess I'm looking for some advice from the community here on how to best accomplish my goal with decent quality for minimal cost